ash: Add a bluetooth entry in the uber tray.

ash/system/tray/tray_constants.cc

Index: ash/system/tray/tray_constants.cc
diff --git a/ash/system/tray/tray_constants.cc b/ash/system/tray/tray_constants.cc
index 0c4d77b48aff93bffd6e20407c8bdc901d0de4a6..f4b091e7b283f16c8d0c24a334613a8aaf9229f4 100644
--- a/ash/system/tray/tray_constants.cc
+++ b/ash/system/tray/tray_constants.cc
@@ -10,9 +10,11 @@ namespace ash {
 
 const int kTrayPaddingBetweenItems = 8;
 const int kTrayPopupAutoCloseDelayInSeconds = 2;
-extern const int kTrayPopupPaddingHorizontal = 18;
+const int kTrayPopupPaddingHorizontal = 18;
 const int kTrayPopupPaddingBetweenItems = 5;
 
+const int kTrayPopupDetailsIconWidth = 27;
+
 const SkColor kBackgroundColor = SK_ColorWHITE;
 const SkColor kHoverBackgroundColor = SkColorSetRGB(0xfb, 0xfc, 0xfb);